double actual = percentiles().index(33).computeInPlace(dataset);
    assertThat(dataset).usingExactEquality().containsExactlyElementsIn(PSEUDORANDOM_DATASET);
  }

  public void testPercentiles_indexes_varargsPairs_compute_doubleCollection() {
    for (int index1 = 0; index1 <= 100; index1++) {
      for (int index2 = 0; index2 <= 100; index2++) {
        ImmutableMap.Builder<Integer, Double> expectedBuilder = ImmutableMap.builder();